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nntp.c
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/**
* @file
* Usenet network mailbox type; talk to an NNTP server
*
* @authors
* Copyright (C) 1998 Brandon Long <[email protected]>
* Copyright (C) 1999 Andrej Gritsenko <[email protected]>
* Copyright (C) 2000-2017 Vsevolod Volkov <[email protected]>
*
* @copyright
* This program is free software: you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation, either version 2 of the License, or (at your option) any later
* version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <ctype.h>
#include <limits.h>
#include <string.h>
#include <unistd.h>
#include "mutt.h"
#include "nntp.h"
#include "account.h"
#include "bcache.h"
#include "body.h"
#include "context.h"
#include "envelope.h"
#include "globals.h"
#include "header.h"
#include "lib/lib.h"
#include "mailbox.h"
#include "mutt_curses.h"
#include "mutt_socket.h"
#include "mx.h"
#include "ncrypt/ncrypt.h"
#include "options.h"
#include "protos.h"
#include "thread.h"
#include "url.h"
#ifdef USE_SSL
#include "mutt_ssl.h"
#endif
#ifdef USE_HCACHE
#include "hcache/hcache.h"
#endif
#ifdef USE_SASL
#include <sasl/sasl.h>
#include <sasl/saslutil.h>
#include "mutt_sasl.h"
#endif
static int nntp_connect_error(struct NntpServer *nserv)
{
nserv->status = NNTP_NONE;
mutt_error(_("Server closed connection!"));
mutt_sleep(2);
return -1;
}
/**
* nntp_capabilities - Get capabilities
* @retval -1 Error, connection is closed
* @retval 0 Mode is reader, capabilities setted up
* @retval 1 Need to switch to reader mode
*/
static int nntp_capabilities(struct NntpServer *nserv)
{
struct Connection *conn = nserv->conn;
bool mode_reader = false;
char buf[LONG_STRING];
char authinfo[LONG_STRING] = "";
nserv->hasCAPABILITIES = false;
nserv->hasSTARTTLS = false;
nserv->hasDATE = false;
nserv->hasLIST_NEWSGROUPS = false;
nserv->hasLISTGROUP = false;
nserv->hasLISTGROUPrange = false;
nserv->hasOVER = false;
FREE(&nserv->authenticators);
if (mutt_socket_write(conn, "CAPABILITIES\r\n") < 0 ||
mutt_socket_readln(buf, sizeof(buf), conn) < 0)
return nntp_connect_error(nserv);
/* no capabilities */
if (mutt_strncmp("101", buf, 3) != 0)
return 1;
nserv->hasCAPABILITIES = true;
/* parse capabilities */
do
{
if (mutt_socket_readln(buf, sizeof(buf), conn) < 0)
return nntp_connect_error(nserv);
if (mutt_strcmp("STARTTLS", buf) == 0)
nserv->hasSTARTTLS = true;
else if (mutt_strcmp("MODE-READER", buf) == 0)
mode_reader = true;
else if (mutt_strcmp("READER", buf) == 0)
{
nserv->hasDATE = true;
nserv->hasLISTGROUP = true;
nserv->hasLISTGROUPrange = true;
}
else if (mutt_strncmp("AUTHINFO ", buf, 9) == 0)
{
safe_strcat(buf, sizeof(buf), " ");
strfcpy(authinfo, buf + 8, sizeof(authinfo));
}
#ifdef USE_SASL
else if (mutt_strncmp("SASL ", buf, 5) == 0)
{
char *p = buf + 5;
while (*p == ' ')
p++;
nserv->authenticators = safe_strdup(p);
}
#endif
else if (mutt_strcmp("OVER", buf) == 0)
nserv->hasOVER = true;
else if (mutt_strncmp("LIST ", buf, 5) == 0)
{
char *p = strstr(buf, " NEWSGROUPS");
if (p)
{
p += 11;
if (*p == '\0' || *p == ' ')
nserv->hasLIST_NEWSGROUPS = true;
}
}
} while (mutt_strcmp(".", buf) != 0);
*buf = '\0';
#ifdef USE_SASL
if (nserv->authenticators && strcasestr(authinfo, " SASL "))
strfcpy(buf, nserv->authenticators, sizeof(buf));
#endif
if (strcasestr(authinfo, " USER "))
{
if (*buf)
safe_strcat(buf, sizeof(buf), " ");
safe_strcat(buf, sizeof(buf), "USER");
}
mutt_str_replace(&nserv->authenticators, buf);
/* current mode is reader */
if (nserv->hasDATE)
return 0;
/* server is mode-switching, need to switch to reader mode */
if (mode_reader)
return 1;
mutt_socket_close(conn);
nserv->status = NNTP_BYE;
mutt_error(_("Server doesn't support reader mode."));
mutt_sleep(2);
return -1;
}
char *OverviewFmt = "Subject:\0"
"From:\0"
"Date:\0"
"Message-ID:\0"
"References:\0"
"Content-Length:\0"
"Lines:\0"
"\0";
/**
* nntp_attempt_features - Detect supported commands
*/
static int nntp_attempt_features(struct NntpServer *nserv)
{
struct Connection *conn = nserv->conn;
char buf[LONG_STRING];
/* no CAPABILITIES, trying DATE, LISTGROUP, LIST NEWSGROUPS */
if (!nserv->hasCAPABILITIES)
{
if (mutt_socket_write(conn, "DATE\r\n") < 0 ||
mutt_socket_readln(buf, sizeof(buf), conn) < 0)
return nntp_connect_error(nserv);
if (mutt_strncmp("500", buf, 3) != 0)
nserv->hasDATE = true;
if (mutt_socket_write(conn, "LISTGROUP\r\n") < 0 ||
mutt_socket_readln(buf, sizeof(buf), conn) < 0)
return nntp_connect_error(nserv);
if (mutt_strncmp("500", buf, 3) != 0)
nserv->hasLISTGROUP = true;
if (mutt_socket_write(conn, "LIST NEWSGROUPS +\r\n") < 0 ||
mutt_socket_readln(buf, sizeof(buf), conn) < 0)
return nntp_connect_error(nserv);
if (mutt_strncmp("500", buf, 3) != 0)
nserv->hasLIST_NEWSGROUPS = true;
if (mutt_strncmp("215", buf, 3) == 0)
{
do
{
if (mutt_socket_readln(buf, sizeof(buf), conn) < 0)
return nntp_connect_error(nserv);
} while (mutt_strcmp(".", buf) != 0);
}
}
/* no LIST NEWSGROUPS, trying XGTITLE */
if (!nserv->hasLIST_NEWSGROUPS)
{
if (mutt_socket_write(conn, "XGTITLE\r\n") < 0 ||
mutt_socket_readln(buf, sizeof(buf), conn) < 0)
return nntp_connect_error(nserv);
if (mutt_strncmp("500", buf, 3) != 0)
nserv->hasXGTITLE = true;
}
/* no OVER, trying XOVER */
if (!nserv->hasOVER)
{
if (mutt_socket_write(conn, "XOVER\r\n") < 0 ||
mutt_socket_readln(buf, sizeof(buf), conn) < 0)
return nntp_connect_error(nserv);
if (mutt_strncmp("500", buf, 3) != 0)
nserv->hasXOVER = true;
}
/* trying LIST OVERVIEW.FMT */
if (nserv->hasOVER || nserv->hasXOVER)
{
if (mutt_socket_write(conn, "LIST OVERVIEW.FMT\r\n") < 0 ||
mutt_socket_readln(buf, sizeof(buf), conn) < 0)
return nntp_connect_error(nserv);
if (mutt_strncmp("215", buf, 3) != 0)
nserv->overview_fmt = OverviewFmt;
else
{
int chunk, cont = 0;
size_t buflen = 2 * LONG_STRING, off = 0, b = 0;
if (nserv->overview_fmt)
FREE(&nserv->overview_fmt);
nserv->overview_fmt = safe_malloc(buflen);
while (true)
{
if (buflen - off < LONG_STRING)
{
buflen *= 2;
safe_realloc(&nserv->overview_fmt, buflen);
}
chunk = mutt_socket_readln(nserv->overview_fmt + off, buflen - off, conn);
if (chunk < 0)
{
FREE(&nserv->overview_fmt);
return nntp_connect_error(nserv);
}
if (!cont && (mutt_strcmp(".", nserv->overview_fmt + off) == 0))
break;
cont = chunk >= buflen - off ? 1 : 0;
off += strlen(nserv->overview_fmt + off);
if (!cont)
{
char *colon = NULL;
if (nserv->overview_fmt[b] == ':')
{
memmove(nserv->overview_fmt + b, nserv->overview_fmt + b + 1, off - b - 1);
nserv->overview_fmt[off - 1] = ':';
}
colon = strchr(nserv->overview_fmt + b, ':');
if (!colon)
nserv->overview_fmt[off++] = ':';
else if (strcmp(colon + 1, "full") != 0)
off = colon + 1 - nserv->overview_fmt;
if (strcasecmp(nserv->overview_fmt + b, "Bytes:") == 0)
{
int len = strlen(nserv->overview_fmt + b);
strfcpy(nserv->overview_fmt + b, "Content-Length:", len + 1);
off = b + len;
}
nserv->overview_fmt[off++] = '\0';
b = off;
}
}
nserv->overview_fmt[off++] = '\0';
safe_realloc(&nserv->overview_fmt, off);
}
}
return 0;
}
/**
* nntp_auth - Get login, password and authenticate
*/
static int nntp_auth(struct NntpServer *nserv)
{
struct Connection *conn = nserv->conn;
char buf[LONG_STRING];
char authenticators[LONG_STRING] = "USER";
char *method = NULL, *a = NULL, *p = NULL;
unsigned char flags = conn->account.flags;
while (true)
{
/* get login and password */
if (mutt_account_getuser(&conn->account) || !conn->account.user[0] ||
mutt_account_getpass(&conn->account) || !conn->account.pass[0])
break;
/* get list of authenticators */
if (NntpAuthenticators && *NntpAuthenticators)
strfcpy(authenticators, NntpAuthenticators, sizeof(authenticators));
else if (nserv->hasCAPABILITIES)
{
strfcpy(authenticators, NONULL(nserv->authenticators), sizeof(authenticators));
p = authenticators;
while (*p)
{
if (*p == ' ')
*p = ':';
p++;
}
}
p = authenticators;
while (*p)
{
*p = toupper(*p);
p++;
}
mutt_debug(1, "nntp_auth: available methods: %s\n", nserv->authenticators);
a = authenticators;
while (true)
{
if (!a)
{
mutt_error(_("No authenticators available"));
mutt_sleep(2);
break;
}
method = a;
a = strchr(a, ':');
if (a)
*a++ = '\0';
/* check authenticator */
if (nserv->hasCAPABILITIES)
{
char *m = NULL;
if (!nserv->authenticators)
continue;
m = strcasestr(nserv->authenticators, method);
if (!m)
continue;
if (m > nserv->authenticators && *(m - 1) != ' ')
continue;
m += strlen(method);
if (*m != '\0' && *m != ' ')
continue;
}
mutt_debug(1, "nntp_auth: trying method %s\n", method);
/* AUTHINFO USER authentication */
if (strcmp(method, "USER") == 0)
{
mutt_message(_("Authenticating (%s)..."), method);
snprintf(buf, sizeof(buf), "AUTHINFO USER %s\r\n", conn->account.user);
if (mutt_socket_write(conn, buf) < 0 ||
mutt_socket_readln(buf, sizeof(buf), conn) < 0)
break;
/* authenticated, password is not required */
if (mutt_strncmp("281", buf, 3) == 0)
return 0;
/* username accepted, sending password */
if (mutt_strncmp("381", buf, 3) == 0)
{
#ifdef DEBUG
if (debuglevel < MUTT_SOCK_LOG_FULL)
mutt_debug(MUTT_SOCK_LOG_CMD, "%d> AUTHINFO PASS *\n", conn->fd);
#endif
snprintf(buf, sizeof(buf), "AUTHINFO PASS %s\r\n", conn->account.pass);
if (mutt_socket_write_d(conn, buf, -1, MUTT_SOCK_LOG_FULL) < 0 ||
mutt_socket_readln(buf, sizeof(buf), conn) < 0)
break;
/* authenticated */
if (mutt_strncmp("281", buf, 3) == 0)
return 0;
}
/* server doesn't support AUTHINFO USER, trying next method */
if (*buf == '5')
continue;
}
else
{
#ifdef USE_SASL
sasl_conn_t *saslconn = NULL;
sasl_interact_t *interaction = NULL;
int rc;
char inbuf[LONG_STRING] = "";
const char *mech = NULL;
const char *client_out = NULL;
unsigned int client_len, len;
if (mutt_sasl_client_new(conn, &saslconn) < 0)
{
mutt_debug(1, "nntp_auth: error allocating SASL connection.\n");
continue;
}
while (true)
{
rc = sasl_client_start(saslconn, method, &interaction, &client_out,
&client_len, &mech);
if (rc != SASL_INTERACT)
break;
mutt_sasl_interact(interaction);
}
if (rc != SASL_OK && rc != SASL_CONTINUE)
{
sasl_dispose(&saslconn);
mutt_debug(
1, "nntp_auth: error starting SASL authentication exchange.\n");
continue;
}
mutt_message(_("Authenticating (%s)..."), method);
snprintf(buf, sizeof(buf), "AUTHINFO SASL %s", method);
/* looping protocol */
while (rc == SASL_CONTINUE || (rc == SASL_OK && client_len))
{
/* send out client response */
if (client_len)
{
#ifdef DEBUG
if (debuglevel >= MUTT_SOCK_LOG_FULL)
{
char tmp[LONG_STRING];
memcpy(tmp, client_out, client_len);
for (p = tmp; p < tmp + client_len; p++)
{
if (*p == '\0')
*p = '.';
}
*p = '\0';
mutt_debug(1, "SASL> %s\n", tmp);
}
#endif
if (*buf)
safe_strcat(buf, sizeof(buf), " ");
len = strlen(buf);
if (sasl_encode64(client_out, client_len, buf + len,
sizeof(buf) - len, &len) != SASL_OK)
{
mutt_debug(1,
"nntp_auth: error base64-encoding client response.\n");
break;
}
}
safe_strcat(buf, sizeof(buf), "\r\n");
#ifdef DEBUG
if (debuglevel < MUTT_SOCK_LOG_FULL)
{
if (strchr(buf, ' '))
mutt_debug(MUTT_SOCK_LOG_CMD, "%d> AUTHINFO SASL %s%s\n",
conn->fd, method, client_len ? " sasl_data" : "");
else
mutt_debug(MUTT_SOCK_LOG_CMD, "%d> sasl_data\n", conn->fd);
}
#endif
client_len = 0;
if (mutt_socket_write_d(conn, buf, -1, MUTT_SOCK_LOG_FULL) < 0 ||
mutt_socket_readln_d(inbuf, sizeof(inbuf), conn, MUTT_SOCK_LOG_FULL) < 0)
break;
if ((mutt_strncmp(inbuf, "283 ", 4) != 0) &&
(mutt_strncmp(inbuf, "383 ", 4) != 0))
{
#ifdef DEBUG
if (debuglevel < MUTT_SOCK_LOG_FULL)
mutt_debug(MUTT_SOCK_LOG_CMD, "%d< %s\n", conn->fd, inbuf);
#endif
break;
}
#ifdef DEBUG
if (debuglevel < MUTT_SOCK_LOG_FULL)
{
inbuf[3] = '\0';
mutt_debug(MUTT_SOCK_LOG_CMD, "%d< %s sasl_data\n", conn->fd, inbuf);
}
#endif
if (strcmp("=", inbuf + 4) == 0)
len = 0;
else if (sasl_decode64(inbuf + 4, strlen(inbuf + 4), buf,
sizeof(buf) - 1, &len) != SASL_OK)
{
mutt_debug(1,
"nntp_auth: error base64-decoding server response.\n");
break;
}
#ifdef DEBUG
else if (debuglevel >= MUTT_SOCK_LOG_FULL)
{
char tmp[LONG_STRING];
memcpy(tmp, buf, len);
for (p = tmp; p < tmp + len; p++)
{
if (*p == '\0')
*p = '.';
}
*p = '\0';
mutt_debug(1, "SASL< %s\n", tmp);
}
#endif
while (true)
{
rc = sasl_client_step(saslconn, buf, len, &interaction, &client_out, &client_len);
if (rc != SASL_INTERACT)
break;
mutt_sasl_interact(interaction);
}
if (*inbuf != '3')
break;
*buf = '\0';
} /* looping protocol */
if (rc == SASL_OK && client_len == 0 && *inbuf == '2')
{
mutt_sasl_setup_conn(conn, saslconn);
return 0;
}
/* terminate SASL session */
sasl_dispose(&saslconn);
if (conn->fd < 0)
break;
if (mutt_strncmp(inbuf, "383 ", 4) == 0)
{
if (mutt_socket_write(conn, "*\r\n") < 0 ||
mutt_socket_readln(inbuf, sizeof(inbuf), conn) < 0)
break;
}
/* server doesn't support AUTHINFO SASL, trying next method */
if (*inbuf == '5')
continue;
#else
continue;
#endif /* USE_SASL */
}
mutt_error(_("%s authentication failed."), method);
mutt_sleep(2);
break;
}
break;
}
/* error */
nserv->status = NNTP_BYE;
conn->account.flags = flags;
if (conn->fd < 0)
{
mutt_error(_("Server closed connection!"));
mutt_sleep(2);
}
else
mutt_socket_close(conn);
return -1;
}
/**
* nntp_open_connection - Connect to server, authenticate and get capabilities
*/
int nntp_open_connection(struct NntpServer *nserv)
{
struct Connection *conn = nserv->conn;
char buf[STRING];
int cap;
bool posting = false, auth = true;
if (nserv->status == NNTP_OK)
return 0;
if (nserv->status == NNTP_BYE)
return -1;
nserv->status = NNTP_NONE;
if (mutt_socket_open(conn) < 0)
return -1;
if (mutt_socket_readln(buf, sizeof(buf), conn) < 0)
return nntp_connect_error(nserv);
if (mutt_strncmp("200", buf, 3) == 0)
posting = true;
else if (mutt_strncmp("201", buf, 3) != 0)
{
mutt_socket_close(conn);
mutt_remove_trailing_ws(buf);
mutt_error("%s", buf);
mutt_sleep(2);
return -1;
}
/* get initial capabilities */
cap = nntp_capabilities(nserv);
if (cap < 0)
return -1;
/* tell news server to switch to mode reader if it isn't so */
if (cap > 0)
{
if (mutt_socket_write(conn, "MODE READER\r\n") < 0 ||
mutt_socket_readln(buf, sizeof(buf), conn) < 0)
return nntp_connect_error(nserv);
if (mutt_strncmp("200", buf, 3) == 0)
posting = true;
else if (mutt_strncmp("201", buf, 3) == 0)
posting = false;
/* error if has capabilities, ignore result if no capabilities */
else if (nserv->hasCAPABILITIES)
{
mutt_socket_close(conn);
mutt_error(_("Could not switch to reader mode."));
mutt_sleep(2);
return -1;
}
/* recheck capabilities after MODE READER */
if (nserv->hasCAPABILITIES)
{
cap = nntp_capabilities(nserv);
if (cap < 0)
return -1;
}
}
mutt_message(_("Connected to %s. %s"), conn->account.host,
posting ? _("Posting is ok.") : _("Posting is NOT ok."));
mutt_sleep(1);
#ifdef USE_SSL
/* Attempt STARTTLS if available and desired. */
if (nserv->use_tls != 1 && (nserv->hasSTARTTLS || option(OPT_SSL_FORCE_TLS)))
{
if (nserv->use_tls == 0)
nserv->use_tls =
option(OPT_SSL_FORCE_TLS) ||
query_quadoption(OPT_SSL_START_TLS,
_("Secure connection with TLS?")) == MUTT_YES ?
2 :
1;
if (nserv->use_tls == 2)
{
if (mutt_socket_write(conn, "STARTTLS\r\n") < 0 ||
mutt_socket_readln(buf, sizeof(buf), conn) < 0)
return nntp_connect_error(nserv);
if (mutt_strncmp("382", buf, 3) != 0)
{
nserv->use_tls = 0;
mutt_error("STARTTLS: %s", buf);
mutt_sleep(2);
}
else if (mutt_ssl_starttls(conn))
{
nserv->use_tls = 0;
nserv->status = NNTP_NONE;
mutt_socket_close(nserv->conn);
mutt_error(_("Could not negotiate TLS connection"));
mutt_sleep(2);
return -1;
}
else
{
/* recheck capabilities after STARTTLS */
cap = nntp_capabilities(nserv);
if (cap < 0)
return -1;
}
}
}
#endif
/* authentication required? */
if (conn->account.flags & MUTT_ACCT_USER)
{
if (!conn->account.user[0])
auth = false;
}
else
{
if (mutt_socket_write(conn, "STAT\r\n") < 0 ||
mutt_socket_readln(buf, sizeof(buf), conn) < 0)
return nntp_connect_error(nserv);
if (mutt_strncmp("480", buf, 3) != 0)
auth = false;
}
/* authenticate */
if (auth && nntp_auth(nserv) < 0)
return -1;
/* get final capabilities after authentication */
if (nserv->hasCAPABILITIES && (auth || cap > 0))
{
cap = nntp_capabilities(nserv);
if (cap < 0)
return -1;
if (cap > 0)
{
mutt_socket_close(conn);
mutt_error(_("Could not switch to reader mode."));
mutt_sleep(2);
return -1;
}
}
/* attempt features */
if (nntp_attempt_features(nserv) < 0)
return -1;
nserv->status = NNTP_OK;
return 0;
}
/**
* nntp_query - Send data from buffer and receive answer to same buffer
*/
static int nntp_query(struct NntpData *nntp_data, char *line, size_t linelen)
{
struct NntpServer *nserv = nntp_data->nserv;
char buf[LONG_STRING] = { 0 };
if (nserv->status == NNTP_BYE)
return -1;
while (true)
{
if (nserv->status == NNTP_OK)
{
int rc = 0;
if (*line)
rc = mutt_socket_write(nserv->conn, line);
else if (nntp_data->group)
{
snprintf(buf, sizeof(buf), "GROUP %s\r\n", nntp_data->group);
rc = mutt_socket_write(nserv->conn, buf);
}
if (rc >= 0)
rc = mutt_socket_readln(buf, sizeof(buf), nserv->conn);
if (rc >= 0)
break;
}
/* reconnect */
while (true)
{
nserv->status = NNTP_NONE;
if (nntp_open_connection(nserv) == 0)
break;
snprintf(buf, sizeof(buf), _("Connection to %s lost. Reconnect?"),
nserv->conn->account.host);
if (mutt_yesorno(buf, MUTT_YES) != MUTT_YES)
{
nserv->status = NNTP_BYE;
return -1;
}
}
/* select newsgroup after reconnection */
if (nntp_data->group)
{
snprintf(buf, sizeof(buf), "GROUP %s\r\n", nntp_data->group);
if (mutt_socket_write(nserv->conn, buf) < 0 ||
mutt_socket_readln(buf, sizeof(buf), nserv->conn) < 0)
return nntp_connect_error(nserv);
}
if (!*line)
break;
}
strfcpy(line, buf, linelen);
return 0;
}
/**
* nntp_fetch_lines - Read lines, calling a callback function for each
* @retval 0 Success
* @retval 1 Bad response (answer in query buffer)
* @retval -1 Connection lost
* @retval -2 Error in funct(*line, *data)
*
* This function calls funct(*line, *data) for each received line,
* funct(NULL, *data) if rewind(*data) needs, exits when fail or done:
*/
static int nntp_fetch_lines(struct NntpData *nntp_data, char *query, size_t qlen,
char *msg, int (*funct)(char *, void *), void *data)
{
int done = false;
int rc;
while (!done)
{
char buf[LONG_STRING];
char *line = NULL;
unsigned int lines = 0;
size_t off = 0;
struct Progress progress;
if (msg)
mutt_progress_init(&progress, msg, MUTT_PROGRESS_MSG, ReadInc, -1);
strfcpy(buf, query, sizeof(buf));
if (nntp_query(nntp_data, buf, sizeof(buf)) < 0)
return -1;
if (buf[0] != '2')
{
strfcpy(query, buf, qlen);
return 1;
}
line = safe_malloc(sizeof(buf));
rc = 0;
while (true)
{
char *p = NULL;
int chunk = mutt_socket_readln_d(buf, sizeof(buf), nntp_data->nserv->conn,
MUTT_SOCK_LOG_HDR);
if (chunk < 0)
{
nntp_data->nserv->status = NNTP_NONE;
break;
}
p = buf;
if (!off && buf[0] == '.')
{
if (buf[1] == '\0')
{
done = true;
break;
}
if (buf[1] == '.')
p++;
}
strfcpy(line + off, p, sizeof(buf));
if (chunk >= sizeof(buf))
off += strlen(p);
else
{
if (msg)
mutt_progress_update(&progress, ++lines, -1);
if (rc == 0 && funct(line, data) < 0)
rc = -2;
off = 0;
}
safe_realloc(&line, off + sizeof(buf));
}
FREE(&line);
funct(NULL, data);
}
return rc;
}
/**
* fetch_description - Parse newsgroup description
*/
static int fetch_description(char *line, void *data)
{
struct NntpServer *nserv = data;
struct NntpData *nntp_data = NULL;
char *desc = NULL;
if (!line)
return 0;
desc = strpbrk(line, " \t");
if (desc)
{
*desc++ = '\0';
desc += strspn(desc, " \t");
}
else
desc = strchr(line, '\0');
nntp_data = hash_find(nserv->groups_hash, line);
if (nntp_data && (mutt_strcmp(desc, nntp_data->desc) != 0))
{
mutt_str_replace(&nntp_data->desc, desc);
mutt_debug(2, "group: %s, desc: %s\n", line, desc);
}
return 0;
}
/**
* get_description - Fetch newsgroups descriptions
* @param nntp_data NNTP data
* @param wildmat String to match
* @param msg Progress message
* @retval 0 Success
* @retval 1 Bad response (answer in query buffer)
* @retval -1 Connection lost
* @retval -2 Error
*/
static int get_description(struct NntpData *nntp_data, char *wildmat, char *msg)
{
struct NntpServer *nserv = NULL;
char buf[STRING];
char *cmd = NULL;
int rc;
/* get newsgroup description, if possible */
nserv = nntp_data->nserv;
if (!wildmat)
wildmat = nntp_data->group;
if (nserv->hasLIST_NEWSGROUPS)
cmd = "LIST NEWSGROUPS";
else if (nserv->hasXGTITLE)
cmd = "XGTITLE";
else
return 0;
snprintf(buf, sizeof(buf), "%s %s\r\n", cmd, wildmat);
rc = nntp_fetch_lines(nntp_data, buf, sizeof(buf), msg, fetch_description, nserv);
if (rc > 0)
{
mutt_error("%s: %s", cmd, buf);
mutt_sleep(2);
}
return rc;
}
/**
* nntp_parse_xref - Parse cross-reference
*
* Update read flag and set article number if empty
*/
static void nntp_parse_xref(struct Context *ctx, struct Header *hdr)
{
struct NntpData *nntp_data = ctx->data;
char *buf = NULL, *p = NULL;
buf = p = safe_strdup(hdr->env->xref);
while (p)
{
char *grp = NULL, *colon = NULL;
anum_t anum;
/* skip to next word */
p += strspn(p, " \t");
grp = p;
/* skip to end of word */
p = strpbrk(p, " \t");
if (p)
*p++ = '\0';
/* find colon */
colon = strchr(grp, ':');
if (!colon)
continue;
*colon++ = '\0';
if (sscanf(colon, ANUM, &anum) != 1)
continue;
nntp_article_status(ctx, hdr, grp, anum);
if (hdr && !NHDR(hdr)->article_num && (mutt_strcmp(nntp_data->group, grp) == 0))
NHDR(hdr)->article_num = anum;